Quantifying ingested bacteria without realtime PCR

I am working with mosquito larvae and I feed them with suspended and biofilm treated GFP bacteria. I want to quantify (without using qRTPCR) how many of these are ingested by the larvae? Is there a good way to do this? Please help.
Thanks in advance,
-Uma

I am working with mosquito larvae and I feed them with suspended and biofilm treated GFP bacteria. I want to quantify (without using qRTPCR) how many of these are ingested by the larvae? Is there a good way to do this? Please help.Thanks in advance,-Uma

Do the larvae need to live for further experimentation?

If not, homogenize the larvae in PBS and spread aliquots on agar plates and count the colonies.